Table of Contents
How does Apache Calcite work?
Apache Calcite Benefits Multiple Data Models – As Calcite supports query optimization and query execution but does not supports storing and processing of data, which makes it good for mediating between the applications having more than one data storage locations and also using multiple data processing engines.
What is Apache Avatica?
Avatica is a framework for building database drivers. Avatica is defined by a wire API between a client and a server. The Avatica server is an HTTP server, the Avatica client is a JDBC driver, and the wire API is defined by JSON or Protobuf Buffers.
What is drill in big data?
Apache Drill is an open-source software framework that supports data-intensive distributed applications for interactive analysis of large-scale datasets. Drill is the open source version of Google’s Dremel system which is available as an infrastructure service called Google BigQuery.
What is Phoenix Database?
Apache Phoenix is an open source, massively parallel, relational database engine supporting OLTP for Hadoop using Apache HBase as its backing store.
Who uses Apache drill?
Apache Drill enables analysts, business users, data scientists and developers to explore and analyze this data without sacrificing the flexibility and agility offered by these datastores. Drill processes the data in-situ without requiring users to define schemas or transform data.
Where is calcite most commonly found?
Calcite most commonly occurs in sedimentary settings, particularly in shallow marine settings as the shells and hard parts of marine organisms. It is also found in hydrothermal veins and hot spring deposits.
What is kudu Hadoop?
Back to glossary Apache Kudu is a free and open source columnar storage system developed for the Apache Hadoop. It is an engine intended for structured data that supports low-latency random access millisecond-scale access to individual rows together with great analytical access patterns.
Why is Apache Phoenix fast?
Why is it so fast? Phoenix is fast. Full table scan of 100M rows usually completes in 20 seconds (narrow table on a medium sized cluster). This time come down to few milliseconds if query contains filter on key columns.
How do I exit an Apache drill?
Gracefully Shutting Down the Drill Process. Graceful Shutdown is enabled by default. You can gracefully shut down a Drillbit from the command line or the Drill Web UI. You can only use the Graceful Shutdown option in the Drill Web UI to shut down the Drillbit from which you accessed the Drill Web UI.
Which Apache projects use calcite?
Several other Apache projects use Calcite. Hive uses Calcite for cost-based query optimization; Drill and Kylin use Calcite for SQL parsing and optimization; Samza and Storm use Calcite for streaming SQL. As of August 2016 , Apex, Phoenix and Flink have projects under development that use Calcite.
Does calcite have an API?
It includes a SQL parser, an API for building expressions in relational algebra, and a query planning engine. As a framework, Calcite does not store its own data or metadata, but instead allows external data and metadata to be accessed by means of plug-ins .
Where does calcite store its data?
As a framework, Calcite does not store its own data or metadata, but instead allows external data and metadata to be accessed by means of plug-ins . Several other Apache projects use Calcite.
What is the difference between example-CSV and example-calcite?
Calcite does the rest, and provides a full SQL interface. Calcite-example-CSV is a fully functional adapter for Calcite that reads text files in CSV (comma-separated values) format. It is remarkable that a couple of hundred lines of Java code are sufficient to provide full SQL query capability.